package com.ztao.filter;

import com.ztao.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthorizeFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String path = request.getURI().getPath();
        if(path.contains("/login")){
            return chain.filter(exchange);
        }
        String token = request.getHeaders().getFirst("token");
        if(token==null){
            response.setStatusCode(HttpStatus.MULTI_STATUS);
            return response.setComplete();
        }
        Claims claimsBody = AppJwtUtil.getClaimsBody(token);
        int result = AppJwtUtil.verifyToken(claimsBody);
        if(result==1||result==2){
            response.setStatusCode(HttpStatus.MULTI_STATUS);
            return response.setComplete();
        }
        Object apuser = claimsBody.get("id");
        ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
            httpHeaders.add("apuser", apuser + "");
        }).build();

        exchange.mutate().request(serverHttpRequest).build();
        return  chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return -1;
    }
}
